***Another suggestion by AngelRosemary.***
Their tub was oval, not square, and wide enough for both of them. Bakura sat with his legs in a V, and Marik sat in the space between Bakura's legs with his back facing Bakura. They wore their hair up to keep it dry, and suds surrounded them, hiding their lower bodies from view.
Bakura held a large sea sponge. He squeezed the sponge and watched the soapy water slide down Marik's back before he started gently cleansing the skin. He secretly enjoyed it, washing Marik's back. Nothing calmed Marik quite like a hot bath, and when Bakura took his time with the sponge, he managed to coax the sweetest little noises from Marik.
Steam curled up in lazy wisps around them. It reminded Bakura of the spirits that used to swirl around him as a child, and as odd as the association was, it was comforting to him. With his skin wet, Marik's body gleamed like cooling, melted copper. His skin was warm and soft beneath Bakura's fingers, and the water on his body tasted sweet every time Bakura leaned forward to steal a kiss off the nape of Marik's neck.
A half-formed moan slipped out of Marik's throat as Bakura worked on the area below the gods and above the lower cluster of hieratic writing.
"Are you tight there?" Bakura asked.
"A little."
Bakura let go of the sponge. It bobbed in the water, an island in a sea of bubbles. Bakura used both thumbs to rub the area he'd been washing a moment before.
Marik reached out and gripped the lip of the tub with his right hand, arching his back like a cat against Bakura's touch. "Ah!"
Bakura smirked, leaning close to Marik's ear. "Good?"
Marik answered with another half-formed moan, and Bakura rewarded the sound by tracing his tongue along the top, left wing carved into Marik's back. He continued to circle his thumbs into Marik's muscles. He slowed his pace a touch and made larger circles in order to cover more area. Marik squirmed and shifted into Bakura's hands. Each exhale brought a quiet, content noise from Marik's mouth.
Bakura used his fingers and palms to massage the center of Marik's back. He dipped his hands into the warm water and then brought them back to Marik's skin. The warm water kept Marik's muscles relaxed and allowed Bakura to go deeper into the massage. Bakura took his time, rubbing, kneading, smoothing the tension out of Marik's body. By the time the bubbles started to disappear and their fingers began to wrinkle, Marik was a panting, flushed mess.
"Bakura," Marik gasped.
"Hmm?"
"Do you want to go to the bedroom?"
Bakura leaned forward, sucking on Marik's earlobe and sliding his fingers around to Marik's stomach. "Whatever you want."
Marik grunted at Bakura's words, reaching below the water and wrapping his fingers around Bakura's erection. Bakura became the one to moan as Marik gave him a squeeze.
Marik smirked. "I think it's what we both want."